If you haven’t seen Adrian Underhill before, this is a must-see. In a remarkably short time you can learn about the phonemic chart and where in the mouth English sounds are made.
The full video is 1 hour long (!).
For learners of English who turn to dictionaries for help with pronunciation, they usually need to become familar with phonetic spelling. In the video, Adrian introduces you to phonemic symbols and his preferred arrangement.
On short courses, there may not be the time or the need to cover everything but most students benefit from working on their most troublesome sounds. Adrian’s ‘slide’ technique for improving vowel sounds often produces great results.